Surface adhesion modifying compositions

ABSTRACT

The present invention relates to compositions which modify the surface adhesion properties of a surface such as, tableware, cutting board, sinks and food preparation areas, generally

This application claims the benefit of Provisional Application No.60/108,599, filed Nov. 16, 1999.

FIELD OF THE INVENTION

The present invention generally relates to compositions, for a makingsurface adhesion modifying compositions which aids in the removal offood soils form those surfaces. The present invention also relates tocleaning compositions which also modify the surface adhesion of foodsoils to a hard surface.

BACKGROUND OF THE INVENTION

It has always been well understood that regardless to what degree asurface has been rendered “cleaned” the mere appearance of residues dueto the cleaning system will bring into question the efficiency of thecleaning product. Consequently, when a visible film, a residue orstreaking is left behind, the success of the cleaning process becomesdubious. Therefore not only must a cleaning composition wash the surfacein question but it must also leave the surface with the appearance ofbeing cleaned.

Most soils, especially, food soils, such as cake dough, meat juices,etc., are deposited on to a surface “wet”. That is, these soils containsome water, which after time evaporates leaving a hardened soil. It ismuch easier to remove these soils while “wet” than when the water hasevaporated “hardening” the soil. In this scenario, the consumer is facedwith two choices, either clean up the spill immediately and takeadvantage of the moisture in the soil or wait till the soil hashardened. The former, while it is ideal, is impractical for today's busyconsumer, with the multitude of demands on consumers time, stopping toclean up every spill, even minor ones as they happen, is time consumingand impractical. Conversely, while waiting till the end of foodpreparation or the end of the meal, may save time by doing all thecleaning at once. The food soil has by now hardened, making the cleaningtask much more difficult and time consuming. In this case the consumeris left with the situation of either doing a poor job and leaving thestubborn satins or resorting to harsh and/or abrasive cleaners, which isfar from desirable, especially on fine china or delicate work surfacessuch as marble. This limits the consumer to either cleaning up everylittle spill as it happens or resort to harsh and/o abrasive chemicalsto remove tough soils after they have dried.

Non-stick cookware do not have this problem. But, coating every possiblefood contact surface that could, such as cutting boards, kitchen countertops, plates, silverware, high chair trays etc., would be expensive andimpracticable. Applying a coating of “non-stick” baking spray wouldcertainly be a cheap and readily available alternative to Teflon coatingall food contact surfaces. The problem is that these compositions arewhen applied to a surface are greasy to the touch and leave a verydistinctive and visibly unappealing layer. The appearance is that allthe surfaces have been smeared with a stick of butter or margarine.While these so treated surfaces are easy to remove tough food soils fromthey have the distinct appearance of being uncleaned. Consequently,these compositions while solving one problem, create new ones which,would result in the entire surface having the appearance of beingunclean.

The problem remains that there is no convenient way to easily removehard tough food soils.

SUMMARY OF THE INVENTION

It has now been surprisingly found that a surface adhesion modifyingcomposition has been discovered, without the greasy or oily feelnegatives of “non-stick” baking sprays. These novel compositions havebeen found to not have the negative surface appearance of “non-stick”baking sprays. Furthermore, these compositions entirely comprise foodsafe materials, or materials which are Generally Recognized As Safe, orG.R.A.S. materials. This means that these compositions are both safe andsuitable for direct application to food work surfaces, such as cuttingboards, sinks, and kitchen counter tops, as well as direct food contactsurfaces, such as, plates, and silverware.

The compositions of the present invention are surface adhesion modifyingcompositions, which comprise a toxicologically-acceptable film formingpolymer and a toxicologically-acceptable release aid, wherein said filmforming polymer and said release aid are present in a weight ratio offrom about 1:20 to about 20:1, and said composition is without an oilyor greasy feel or touch when applied to a surface.

In a second aspect the compositions of the present invention arecomposition for providing non-stick properties to food-contactingsurfaces comprising a toxicologically-acceptable film forming polymerand a toxicologically-acceptable release aid, wherein said film formingpolymer and said release aid are present in a weight ratio of from about1:20 to about 20:1, and said composition has a non-greasy feel whenapplied to a surface.

In a third aspect, the present invention is also directed to methods forrendering a food-contact surface non-stickable comprising depositing acomposition comprising a toxicologically-acceptable film forming polymerand a toxicologically-acceptable release aid, wherein said film formingpolymer and said release aid are present in a weight ratio of from about1:20 to about 20:1, and said composition has a non-greasy feel whenapplied to a surface.

These surface adhesion modifying compositions can comprise additionalingredients, such that they can clean the surface to which they areapplied as well as leaving a coating or layer which aids in subsequentcleaning of the surface. These compositions can aid cleaning via anyconventional means, including wiping with a wet cloth, rinsing withwater, cleaning with a hard surface cleaner, cleaning the surface in anautomatic dishwasher or via hand in a sink or basin with a handdishwashing composition.

All parts, percentages and ratios used herein are expressed as percentweight unless otherwise specified. All documents cited are, in relevantpart, incorporated herein by reference.

DETAILED DESCRIPTION OF THE INVENTION

As it was stated previously the compositions of the present inventionare surface adhesion modifying compositions, which comprise atoxicologically-acceptable film forming polymer and atoxicologically-acceptable release aid, wherein said film formingpolymer and said release aid are present in a weight ratio of from about1:20 to about 20:1, preferably about 1:10 to about 10:1, and saidcomposition is without an oily or greasy feel or touch when applied to asurface.

The film forming polymer may be any film forming polymer which is a foodacceptable material. Preferred film forming polymer:; includeethylcellulose, hydroxypropylcellulose, methylhydroxypropylcellulose,methyl ethyl cellulose, PVP, copolymer condensates of ethylene oxide andpropylene oxide, and polyethylene glycol. Other suitable film formingpolymers are Gums, such as Agar, Guar gum, Gum arabic, Gum arabic uses,Gum ghatti, Gum karaya, Hydroxypropyl guar gum, and Xanthan gum;Alginates, such as, Calcium alginate, Calcium-sodium alginate; ProteinFilm forming polymers, such as Pectin albumen, poly amino acids (e.g.,poly lysine), gelatin; and Waxes, such as Carnuba wax. Exemplary of thefilm-forming agents of the invention are the following, non-toxic, foodgrade, commercially available, film-forming agents: Natrosol.RTM.(nonionic water-soluble hydroxyethylcellulose from Aqualon, Wilmington,Del.); Methocel.RTM. (methyl hydroxypropylcellulose made from celluloseand propylene oxide and available from Dow Chemical); Bermocoll E.RTM.(non-ionic, water soluble ethyl hydroxyethylcellulose from Akzo Nobel.The preferred film forming agents are Methocel.RTM. E50 LV,Methocel.RTM. K100, Methocel.RTM. F50, Natrosol.RTM. 250KR, BermnocollE:.RTM.351 FQ, Bernocoll E.RTM.411 FQ, and Bernocoll E.RTM.320 FQ.

It is preferred that the film forming polymer present in the compositionin the amount of from about 0.1% to about 50%, more preferably fromabout 0.5% to about 25%, even more preferably from about 1% to about 15%by weight of the composition.

Release agents are widely used in both the manufacturing areas and inthe production and processing of foods. The general technical area ofrelease agents for both manufacturing and food applications issummarized in The Kirk Othmer Encyclopedia of Chemical Technology,fourth edition volume 21 pages 207 to 218 and is incorporated herein byreference. It is preferred that the release agent present in thecomposition in the amount of from about 0.1% to about 50%, morepreferably from about 0.5% to about 25% , even more preferably fromabout 1% to about 15% by weight of the composition.

The release aid is preferably a phospholipid. The most preferred releaseagent is lecithin. The term lecithin can be used to describe both thepure phosphatidyl choline and mixtures of the phosphatidyl choline withother phospholipids, triglycerides, etc. The general technical area oflecithin for both manufacturing and food applications is summarized inThe Kirk Othmer Encyclopedia of Chemical Technology, fourth editionvolume 15 pages 192 to 210 and is incorporated by reference. However,aqueous dispersions of lecithin preferably have a buffer to maintain anear neutral pH. This reduces the extent or likelihood of hydrolysis ofthe lecithins which could result in a loss of efficacy. Compositionswith lecithin that are exposed to air preferably contain an antioxidantto reduce the potential degradation of the lecithin. Aqueous dispersionsof lecithin will require the presence of an antimicrobial preservative.

Other preferred release compounds from include but ale not limited toGlyceryl tristearate, Oxystearin, Castor oil, salts of an oxyacid ofphosphorous, White mineral oil, Petrolatum, Hydrogenated sperm oil,Mineral oil, Mannitol, Calcium stearate, Magnesium carbonate, Magnesiumoxide, Magnesium stearate, Mono- and diglycerides, Monosodium phosphatederivatives of mono- and diglycerides, Sorbitol, and Camauba wax.

These compositions may further comprise a toxicoloeically-acceptablcadjunct. These, when present are preferably selected from the groupconsisting of selected from the group consisting of preservatives,surfactants emulsifiers, surface finish agents, anti-microbial agents,anti-oxidants, solvents, propellants, carriers, perfume, diluents,carriers, or process aids, builders, and mixtures thereof. It ispreferred that the toxicologically-acceptable adjunct when present inthe composition be present in the amount of from about 0.1% to about50%, more preferably from about 0.5% to about 25%, even more preferablyfrom about 1% to about 15% by weight of the composition.

Surface finishing agents may be using either as release agents orcompounds to lessen the negative effects of the release agent. Examplesof such surface finishing agents include but are not limited to areGlyceryl tristearate, Mannitol, Ammonium hydroxide, Dextrin, Wheatgluten, Acacia gum arabic, Mono- and diglycerides, Sorbitol, Beeswax(yellow and white), Candelilla wax, Carnauba war, and Zein. It ispreferred that the surface finishing agents when present in thecomposition be present in the amount of from about 0% to about 5%, morepreferably from about 0.1% to about 3%, even more preferably from about0.5% to about 2% by weight of the composition.

Diluents, carriers, or process aids are often useful in processingcompositions or in the final product physical or performance attributes.These include but are not limited to, water, ethanol, glycerin,triglycerides. It is preferred that the diluents, carriers, or processaids when present in the composition be present in the amount of fromabout 1% to about 99.9%, more preferably from about 5% to about 99.9%,even more preferably from about 20% to about 99.9% by weight of thecomposition.

Propellants are often used in spray applicators and aerosol canisters.Appropriate propellants include but are not limited to: N2O, CO2, N2,Propane, Octafluorocyclobutane.

Diluents, carriers, or process aids are used to aid in the preparation,or delivery of the inventive composition. They can, like the solvents,also be selected to aid in the rapin forming of the non-stick surface.

Product stability is an important factor in the formulation of productsin this application. The inclusion of antioxidants is important becausethe preferred release aid, lecithin, often contain substantial degreeson unsaturation. Appropriate preservative include the followingantioxidants but are not limited to, Anoxomer, BHA., BHT, Ethoxyquin,4-Hydroxymethyl-2,6-di-tert-butyl-phenol, TBHQ, and THBP.

Similarly important to product stability is resistance to microbialcontamination and growth. While much microbial contamination can beavoided through careful manufacturing practices, it is important toinclude an antimicrobial preservative as occasional contamination mayoccur in the manufacturing process or periodic use of the product (e.g.,occasional household use) may expose the composition to microbialcontamination over its expected usage period. Appropriate antimicrobialpreservatives include but are not limited to, Heptylparaben, Quaternaryammonium chloride combination, Benzoic acid, Lactic acid, Potassium acidtartrate, Propionic acid, Ethyl alcohol, Hydrogen peroxide,Methylparabcn, Nisin preparation, Propylparaben, Sodium benzoate, Sodiumdiacetate, and Sodium propionate. Other potentially useful preservativesare chelants such as Calcium disodium EDTA and Disodium EDTA.

The use of builders or other sequestrants is also contemplated. Suitablebuilders and sequestrants include but are not limited to: Citric acid orits salts, Sodium tripolyphosphatc, Sodium acid phosphate, Calciumdiacetate, Calcium hexametaphosphate, Monobasic calcium phosphate,Dipotassium phosphate, Disodium phosphate, Sodium gluconate, Sodiumhexametaphosphate, Sodium metaphosphate, Sodium phosphate, Sodiumpyrophosphate, Tetra sodium pyrophosphate, and Sodium tripolyphosphateThe use of surfactants and emulsifiers, and other purpose is alsocontemplated. Suitable surfactants, emulsifiers include but are notlimited to, Dioctyl sodium sulfosuccinate , Glyceryl tristearate, Methylglucoside-cocornut oil ester, Oxystearin, Sodium lauryl sulfate, Sodiummono- and dimethyl naphthalene sulfonates, Sodium stearyl fumarate,Acetylated monoglycerides, Succinylated monoglycerides, Monoglyceridecitrate, Ethoxylated mono- and diglycerides, Polysorbate 60, Polysorbate65, Polysorbate 80, Polydextrose, Sorbitan monostearate, Calciumstearoyl-2-lactylate, Sodium stearoyl-2-lactylate, Lactylic esters offatty acids, Lactylated fatty acid esters of glycerol and propyleneglycol, Glyceryl-lacto esters of fatty acids, Polyglycerol esters offatty acids, Propylene glycol mono- and diesters of fats and fattyacids, Propylene glycol alginate, Sucrose fatty acid esters, Fattyacids, Oleic acid derived from tall oil fatty acids, Salts of fattyacids, and Synthetic fatty alcohols.

It may be necessary to add a thickening agent to the composition of thepresent invention in order to obtain the desired viscosity. Suitablethickening agents include modified starches, vegetable gums and otherconventional thickening agents suitable for food use.

An essential part of the definition of active materials is that thematerials used be toxicologically safe so they may be appropriately andsafely used on food contact surfaces. Listing of appropriate ingredientsfor use in foods is given in the Code of the Federal Register (21) (CFR21). In general most of the material described herein are ingredientsdescribed in CFR 21

The compositions of the present invention can be of any convenient form.However, it is preferred that the compositions are in the form of aliquid, gel, paste, aerosol and pumpable spray. The composition can beeither sprayed on directly or applied via a cloth, or directly on to thesurface via a contact surface, such as a sponge, which is attached tothe container which holds the composition. The solution may be appliedby use of any number of standard spraying devices. The spraying devicesshould produce a uniform spray pattern so as to evenly coat the targetsurface.

The solution may be applied by use of various dispensing devices. Thedispensing devices will be comprised of two essential parts. The firstessential part is a applicator implement that when contacted with thesurface to be treated dispenses the active solution evenly and smoothlyonto the target surface. The implement could be an approximately flat,rigid or semi rigid article covered by a foam or sponge-like coveringthat is porous with respect to the solution. The approximately flatnature of the applicator implement is useful in achieving uniformcoverage of flat surface with minimal effort. The size of the applicatorhead would be approximately from 0.5 cm×1.0 cm to approximately 10 cm×20cm. The exact dimensions would be dictated by the specific intended useof the applicator implement. In general if the implement is designed forareas of large relatively flat surface area, a larger sized applicatorimplement would be preferred. Conversely for less flat or smallersurfaces areas, a smaller or some what less flat applicator implementmay be preferred. The second essential part of the device is a reservoirfor the solution. The reservoir for the solution is connected to theapplicator implement such that as the solution is dispensed form thehead, the solution is replenished in the applicator implement

Alternatively, the composition is adsorbed on to a flexible substrate,either woven material or non-woven fabric, such as cotton, paper. Byfabric, it is meant to include cotton, paper, polymers etc. Thesecompositions can be directly applied to a surface via wiping oralternatively the substrate containing the composition could be wetfirst to aid in soil removal and application of the surface adhesionmodifying compositions.

Furthermore, it is preferred that the composition, when applied to thesurface be able to provide non-stick/filming effects for at least threeresoiling cycles. By “resoiling cycles” it is meant soil is deposited,then wiped clean. This is one “resoiling cycle”. Greasy feel

The measurement of the greasy feel can be done by qualitative assessmentby trained judges. Methods for similar tactile assessments are given inASTM method E1490-92 which gives a methodology for descriptive skin feelanalysis of creams and lotions. In this standard appropriate terms forgreasy, oily, and waxy are given.

Evaluations of the tactile properties of the treated surface is done asfollows. First substrates are prepared. In this case glass and stainlesssteel slides are used. The following surface treatments can be prepared:

1. Vegetable oil (greasy/oily control)

2. Release aid systems (variation 1) being evaluated.

3. Release aid systems (variation 2) being evaluated.

4. Release aid systems (variation 3) being evaluated.

5. Release aid systems (variation 4) being evaluated.

6. No treatment (non greasy or non oily control).

Six slides of each treatment are prepared for each grader. From 5-10graders are used.

Graders are asked to evaluate each slide for greasy or oily feel andthen grade the slides on the following scale

0=very greasy / oily (treatment 1)

1=greasy or oily feel

2=There is a slight greasy or oily feel.

3=May be a slight greasy or oil feel

4=No greasy or oily feel (treatment 6)

Alternatively, one may assess the greasy feel through frictionmeasurements of untreated and treated substrates. Some suitable methodsfor ioing this are described in ASTM D4518-91 and G 115-93 and therelated articles cited therein.

EXAMPLES

Substrate preparation.

1. Standard glass slides or slides made from standard stainless steelare used for this test.

2. The slides are weighed.

3. The substrates are pretreated as follows. Test solutions (forexample, a dispersion of a commercial lecithin sample in water with thefilm forming polymer) are prepared and placed on the slides and areallowed to dry.

4. The slides are weighed again.

5. After drying, the samples are soiled for testing.

6. The slides are weighed again.

7. Control slides are not pretreated.

Egg soil samples for this test are prepared as detailed below

1. The yolks are separated from the whites for 3 dozen A or AA Largeeggs.

2. The chalzia is removed.

3. The yolks are rinsed in cold water.

4. The yolks are put through a strainer and allow to drain into abeaker.

5. The beaker of strained yolks is placed in a hot water bath (60C) andcook for 45 minutes.

6. After 45 minutes, the yolks are removed from hot water bath and placebeaker in ice water to cool yolks to room temp. (23C).

7. The coupons are soiled by pipetting cooled egg mixture onto couponsin a Z shape.

8. The coupons are baked for 1.5 hours at 100C, turning trays andswitching racks from top to bottom half way through baking time.

The Velveeta Cheese Soil for this test are prepared as follows

1. Kraft Velveeta slices (20slice per pack—Prepared Cheese Product, 9%total fat content) are used.

2. The cheese is cut into 1¼inch circles (1.5 to 2.0 gm each).

3. The cheese circle is placed on a coupon.

4. The coupons with cheese are baked for 30 minutes at 120C. The traysare rotated and racks are switched from top to bottom and cooked for 25more minutes. Total of 55 minutes at 120C.

The Eagle Brand Condensed Milk Soil for this test may be prepared asfollows:

1. The 14 oz can of Borden Eagle Brand Sweetened Condensed Milk is used.

2. The coupons are soiled by pipetting condensed milk onto coupons in aZ shape. (3 to 4 grams).

3. The soiled are baked coupons for 30 minutes at 120C. The trays arerotated and the bottom and top racks are switched. The slides are cookedfor an additional 30 minutes at 120C.

Evaluation of Release Properties

The soiled slides are evaluated for release properties in the followingmanner.

1. The slides are placed in an Automatic Dish Washing machine (e.g., aGeneral Electric 500 in the United States) and are washed with astandard commercially available (e.g., Cascade, Sunlight, Electrosol)detergent for Automatic Dish Washing machines.

2. After washing, the slides are weighed to determine the mass theoriginal soil remaining.

3. In cases where the release properties are very good there isessentially no adhesion and the soil may fall off prior to washinggiving essentially 100% removal of the soil.

Results from Evaluation of Releasc Properties

Slide Preparation

1 2 3 4 5 6 HPMC level — 10% — — — HPC level — — — 2% — — Centromix E —— — 2% 2% 2% level Crisco Spray On — as is — — — — grams/slide .03 0.10.1 0.1 0.1 (target) diluent water EtOH EtOH water

Evaluation of release properties by percent removal (by mass) oforiginal soil.

1 2 3 4 5 6 Egg on Stainless 18 98 16 99 98 97 Egg on Glass 20 81 35 6889 83 Cheese on 16 24 78 45 40 50 Stainless Cheese on Glass 30 100  40100  100  100  Condensed Milk 77 96 67 73 79 93 on Stainless CondensedMilk 73 97 77 79 84 87 on Glass Notes: 1. Centromix E can be obtainedfrom the Central Soya Company. 2. HPC (hydroxypropylcellulose; KlucelHPC type LFF) can be obtained from Hercules. 3. HPMC(hydroxypropylmethylcellulose; Methocel E3 Prem LV) can be obtained fromDow Chemical. 4. Soiled slides are washed in a GE 500 automaticdishwashing machine at the following conditions  A. Water temperature120 F.  B. Water hardness: 18 grains per gallon.  C. A standardautomatic dishwashing detergent powder such as Cascade, Sunlight.

% % Pump spray A B Centromix E 2.00 0.01 to 50 HPC,hydroxypropylcellulose 2.00 0.01 to 50 Deionized water balance 0 to 99.9Ethanol 1 0 to 99.9 Methylparaben. (Methyl p- 0.10 0.01 to 0.2hydroxybenzoate) BHT. butylated 50 ppm 10 to 1000 hydroxytoluene ppmDisodium EDTA. disodium 1000 0 to 5000 ethylenediaminetetraacetate ppmppm sodium citrate 1000 0 to 5000 ppm ppm emulsifying or stabilixation0.50 0 to 5.00 agents Aerosol spray C D Centromix E 2.00 0.01 to 50 HPC,hydroxypropylcellulose 2.00 0.01 to 50 Nitrous oxide, N2O. 1 0 to 10Nitrogen, N2 nil 0 to 10 Deionized water balance 0 to 99.9 Ethanol 5.000 to 8 § 184.1490 Methylparaben. 0.10 0.01 to 0.2 methylp-hydroxybenzoate BHT. Butylated 50 ppm 10 to 1000 hydroxytoluene ppmDisodium EDTA. disodium 1000 0 to 5000 ethylenediaminetetraacetate ppmppm sodium citrate 1000 0 to 5000 ppm ppm emulsifying or stabilixation0.50 0 to 5.0 agents Wipe or dispenser E F Centromix E 2.00 0.01 to 50.0HPC, hydroxypropylcellulose 2.00 0.01 to 50.0 Deionized water balance 0to 99.9 § 184.1490 Methylparaben. 0.10 0.01 to 0.2 methylp-hydroxybenzoate BHT. Butylated 50 ppm 10 to 1000 hydroxytoluene ppmDisodium EDTA. Disodium 1000 0 to 5000 ethylenediaminetetraacetate ppmppm sodium citrate 1000 0 to 5000 ppm ppm

What is claimed is:
 1. A surface adhesion modifying compositioncomprising a toxicologically-acceptable film forming polymer, atoxicologically-acceptable release aid, and a toxicologically-acceptableadjunct; wherein said film forming polymer and said release aid arepresent in a weight ratio of from about 1:20 to about 20:1, wherein saidadjunct is selected from the group consisting of ethylcellulose,hydroxypropylcellulose, methylhydroxypropylcellulose, methyl ethylcellulose, PVP, copolymer condensates of ethylene oxide and propyleneoxide, and polyethylene glycol, and mixtures thereof; wherein saidcomposition has a non-greasy feel when applied to a surface; and whereinsaid toxicologically-acceptable film forming polymer, release aid, andadjunct contains an active material that is safe for use on food contactsurfaces.
 2. A composition according to claim 1 wherein said compositionprovides non-stick properties to a food-contacting surface when appliedto said surface.
 3. A composition according to claim 1 wherein saidrelease aid is selected from the group consisting of phospholipids, andmixtures thereof.
 4. A composition according to claim 1 wherein saidcomposition is in a form selected from the group consisting of a liquid,gel, paste, aerosol, solid, and pumpable spray.
 5. A compositionaccording to claim 3 wherein said carrier is adsorbed on to a flexiblesubstrate.
 6. A composition according to claim 5 wherein said flexiblesubstrate is selected from the group consisting of woven fabric,non-woven fabric, and mixtures thereof.
 7. A composition according toclaim 3 wherein said solvent is selected such that the compositionprovides a dry surface after 5 minutes.
 8. A surface adhesion modifyingcomposition comprising a toxicologically-acceptable release aid, saidcomposition is without an oily or greasy feel or touch when applied to asurface, wherein said composition is applied to a surface as a film,said film is water resistant but said film is removable upon applicationof a cleaning solution.
 9. A surface adhesion modifying and cleaningcomposition said composition comprising a toxicologically-acceptablerelease aid and a cleaning system; wherein said composition is withoutan oily or greasy feel or touch when applied to a surface; and whereinsaid toxicologically-acceptable release aid contains an active materialthat is safe for use on food contact surfaces.
 10. A method forrendering a food-contact surface non-stickable comprising depositing acomposition according to claim 1 onto said food-contact surface.
 11. Amethod for preventing the adhesion of a soil to a hard surfacecomprising the application to the surface the composition according toclaim
 1. 12. A method of aiding the cleaning of a hard surface, that issubject to resoiling, comprising the step of contacting said hardsurface with an effective-amount of the composition of claim 1 toprovide non-stick/filming effects for at least three resoiling cycles.